Transcript for 2 Children Plummet to the Ground When They Fall Out of a Ferris Wheel

They could still be charged the felony burglary. And today, news of two children falling out of a ferris wheel. Plummeting to the ground as witnesses watched in fear. Paula ferris with what they saw and heard. Reporter: In a year where we've seen some of the most extreme rides ever, it was a simple ferris wheel that left two kids in critical, but stable, condition at this small fair in southeastern Michigan. We knew it looked like it was pretty serious. Reporter: An 8-year-old boy and his 16-year-old sister, rig riding across from one another. And the opening just dumped the kids out, dropping them 15 to 20 feet. Police are investigating, but say there was no mechanical problem. We have seen rides at larger amusement parks malfunction this year, including two dozen people dangling for hours at this Los Angeles magic mountain. But bigger, faster, steeper doesn't always mean more dangerous. In fact, the smaller rides ininjury smaller children. It's up to individual states to make sure rides are safe. And right now, 17 states don't have an agency responsible for inspecting rides. Tonight, it's back up and running. And those two kids who took the scary plunge are expected to be just fine. Paula Faris, ABC news, New York.

This transcript has been automatically generated and may not be 100% accurate.

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